FUTURE WORRIES Although once regarded by some researchers as a relatively harmless condition, childhood anxiety raises the likelihood of encountering serious problems later in life, researchers now say. By Bruce Bower sciencenews.org

CUT AND CLOT Two minutes after being cut open, the white flesh of an immature Solanum ossicruentum fruit turns red. After five minutes of air exposure, the bush tomato’s bloody color becomes even darker. By Sharon Schwartz sciencenews.org

NIGHT LIGHTS More than a third of Earth’s population can no longer see the Milky Way at night, a new atlas of light pollution shows. Relatively pristine night skies, such as this one above Dinosaur National Park on the border of Colorado and Utah, are increasingly rare. By THOMAS SUMNER. sciencenews.org

STICKY BUSINESS Pseudomonas aeruginosa (light green cells) biofilms are communities of bacteria encased in a coating primarily of sugar polymers (dark green). Enzymes that the bacteria use to build the coating can also chew it up, a new study suggests.